Drinking tumbler



FIG. 1 shows a perspective view of the drinking tumbler of this invention;

FIG. 2 shows a side elevation view of the drinking tumbler;

FIG. 3 shows a view looking downwardly into the drinking tumbler from the top; and,

FIG. 4 shows a bottom plan view of the drinking tumbler. 

The ornamental design for a drinking tumbler, as shown. 